This process of dephasing and reduction in the amount of transverse magnetization is called transverse relaxation. A characteristic time representing the decay of the signal by 1/ e, or 37%, is called the T2 relaxation time (1).2 * is shorter than T2 (Fig 1), and their relationship can be expressed by the following equation (3), where Î³ is the gyromagnetic ratio: 1/T2 * = 1/T2 + Î³ Î´B inhom, or 1/T2 * = 1/T2 + 1/T2â², where 1/T2â² = Î³ Î´B inhom, and Î´B inhom is the magnetic field inhomogeneity across a voxel.
An average central ac will use 3000 to 5000 watts of power every hour for around 9 hours a day during the hotter months. Click calculate to find the energy consumption of a central air conditioner using 3500 Watts for 3 hours a day @ $0.10 per kWh. Running 3 hours a day is the same as running 9 hours a day for 4 of the warmer months. Cost Per Hour:
The power needed to run an A/C is tied to its EER (Energy Efficiency Rating). Also at HomeDepot, the highest EER of portable air conditioners is 9.5 like the Haier CPN14XH9. For this 14,000 BTU unit to work, 14,000 / 9.5 = 1,473 Watt of power will be consumed. All consumed power will become waste heat. 1,473 Watt will become 1,473 x 3.412 = 5,028 BTU (per hour) waste heat.